\\n "行继续字符后出现意外字符"

Question

I have a recurring problem when trying to use \\n in python. I'm trying to get the code to write to a text file after extracting data from another text file howeve when i run the code it always shows a "unexpected character after line continuation character" error after the \\n. This is the code i am currently using.

while True:
 while True:
    try:
        Prod_Code = input("enter an 8 digit number or type Done to get your final receipt: ")
        check = len(Prod_Code)
        int(Prod_Code) 

        if check == 8:
            print("This code is valid")



            with open('Data Base.txt', 'r') as searchfile:
                for line in searchfile:
                    if Prod_Code in line:
                        print(line)
                        receipt = open('Receipt.txt', 'w')
                        receipt.write(line, \n)
                        receipt.close()
                        break

        else:
            print("incorrect length, try again")

    except ValueError:
        if Prod_Code == "Done":
            print("Your receipt is being calculated")
            exit()

        else:
             print("you must enter an integer")

Answer 1

unlike print<\/code> , write<\/code> accepts only one argument (also you cannot write floats & ints without converting them to string - not the issue here).

receipt.write(line + "\n")